The ISO7421E-Q1 provides double galvanic isolation of up to 2.5 KVrms for 1 minute per UL. This digital isolator has two isolation channels in a bi-directional configuration. Each isolation channel has a logic input and output buffer separated by a silicon oxide (SiO2) insulation barrier. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.
The devices have TTL input thresholds and require two supply voltages, 3.3 V or 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V supply.
Note: The ISO7421E-Q1 is specified for signaling rates up to 50 Mbps. Due to their fast response time, under most cases, these devices will also transmit data with much shorter pulse widths. Designers should add external filtering to remove spurious signals with input pulse duration < 20 ns if desired.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | Low-power dual digital isolators datasheet (Rev. C) | PDF | HTML | 07 Feb 2019 |
| Certificate | VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. Z) | 29 May 2026 | ||
| White paper | Improve Your System Performance by Replacing Optocouplers with Digital Isolators (Rev. D) | PDF | HTML | 07 Nov 2025 | |
| Certificate | CSA Certificate for ISO752xDW ISO7421E-Q1DW | 15 Mar 2023 | ||
| Certificate | UL Certificate of Compliance File E181974 Vol 4 Sec 3 | 08 Aug 2022 | ||
| White paper | Why are Digital Isolators Certified to Meet Electrical Equipment Standards? | 16 Nov 2021 | ||
| White paper | Distance Through Insulation: How Digital Isolators Meet Certification Requiremen | PDF | HTML | 11 Jun 2021 | |
| Application brief | How to Replace Optocouplers with Digital Isolators in Standard Interface Circuit (Rev. A) | PDF | HTML | 19 May 2021 | |
| Application brief | Considerations for Selecting Digital Isolators | 24 Jul 2018 |
For additional terms or required resources, click any title below to view the detail page where available.
DIGI-ISO-EVM is an evaluation module (EVM) used to evaluate any of the TI single-channel, dual-channel, triple-channel, quad-channel or six-channel digital isolator devices in five different packages - 8-pin narrow-body SOIC (D), 8-pin wide-body SOIC (DWV), 16-pin wide-body SOIC (DW), 16-pin ultra- (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOIC (DW) | 16 | Ultra Librarian |
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